Comment 2 for bug 1998231

Reviewed: https://review.opendev.org/c/starlingx/openstack-armada-app/+/866045
Committed: https://opendev.org/starlingx/openstack-armada-app/commit/a41e35174fd17dfdc1f3bed09ef49017f00b3a86
Submitter: "Zuul (22348)"
Branch: master

commit a41e35174fd17dfdc1f3bed09ef49017f00b3a86
Author: Thales Elero Cervi <email address hidden>
Date: Tue Nov 29 13:28:28 2022 -0300

    Decode cmd return string for keyring password

    When running the application on Debian, now on Python 3 strings are
    stored as Byte Strings instead of Unicode Strings. The return of cmd
    execution that is stored as a Byte String is problematic for keyring
    password saving function, that requires an Unicode string.

    This change simply decode the bytes to Unicode, so the plugin is now
    compatible with Python 3. By Duck Typing it, the plugin will still be
    compatible with Python 2 for ensuring upgrades are still possible.

    TEST PLAN:
    PASS - Build stx-openstack-helm-fluxcd package
    PASS - Run build-helm-charts.sh (build app)
    PASS - Upload stx-openstack app on Debian
    PASS - Upload stx-openstack app on CentOS

    Closes-Bug: 1998231

    Signed-off-by: Thales Elero Cervi <email address hidden>
    Change-Id: Ib28bca757c1946513e0b7bc57d4c22937842587a